Acid composition with high concentrations of active materials for the treatment of water and/or cleaning installations containing same
US4765921A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 1987 |
| Grant date | Aug 23, 1988 |
| Priority date | — |
| Expiry date | Jun 22, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23F11/08
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Acid compositions with high concentrations of active ingredients intended for the treatment of industrial or domestic waters and for cleaning the corresponding industrial or sanitary installations, comprising carboxylic polymer materials, a strong acid, possibly a salt of a divalent metal and possibly known specific agents, which comprise: PA1 (a) from 10 to 60% by weight expressed in anhydrous form of a water-soluble carboxylic polymer in its acid form containing at least 5% by weight and preferably at least 10% by weight of itaconic acid, PA1 (b) from 10 to 80% by weight expressed in anhydrous form of at least one strong acid, PA1 (c) from 0 to 15% by weight expressed in anhydrous form of zinc in the form of Zn.sup.2+ ions, PA1 (d) from 0.1 to 10% by weight expressed in anhydrous form of specific agents, PA1 (e) from 5 to 65% by weight of water. These acid compositions with high concentrations have the property of inhibiting the scaling and corrosion of industrial and/or domestic installations and can be used for cleaning sanitary installations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.